Orientable lens for an LED fixture

Abstract

A mounting surface for mounting a plurality of LEDs has a plurality of orientable lenses each individually affixed about a single LED. Each orientable lens has a primary reflector and a refracting lens that direct light emitted from a single LED to a reflective surface of the orientable lens that reflects the light off a primary LED light output axis.

1. An optical system for a LED fixture, comprising:
 a mounting surface; 
 a plurality of individual LEDs attached to said mounting surface; 
 a plurality of orientable lenses each having a base; 
 a positioning sheet in contact with said base of each of said orientable lenses that provides force on said base of each of said orientable lenses in a direction towards said mounting surface, thereby compressing a portion of each of said orientable lenses between said mounting surface and said positioning sheet; 
 wherein said base of each of said orientable lenses is adjacent to said mounting surface about a single LED of said plurality of LEDs; 
 wherein said positioning sheet has a plurality of lens apertures, each of said lens apertures having at least one of an alignment protrusion and an alignment notch, each of said lens apertures surrounding one of said orientable lenses having a corresponding other of said alignment protrusion and said alignment notch, wherein said alignment protrusion and said alignment notch interface to position each of said orientable lenses at a predefined rotational angle; 
 wherein each of said orientable lenses has a primary reflector at least partially surrounding a refracting lens; and 
 wherein said refracting lens and said primary reflector of each of said orientable lenses collimate light emitted from said single LED to a reflective surface supported by said base of each of said orientable lenses and angled to reflect a majority of said light off a LED light output axis of said single LED. 
 
     
     
       2. The optical system for a LED fixture of  claim 1 , further comprising a heatsink thermally coupled to said mounting surface. 
     
     
       3. The optical system for a LED fixture of  claim 1 , wherein each of said orientable lenses has said alignment protrusion and each of said lens apertures has said alignment notch. 
     
     
       4. The optical system for a LED fixture of  claim 1 , wherein each of said orientable lenses has a first portion most proximal said mounting surface and a second portion most distal said mounting surface, and wherein a majority of said positioning sheet is more proximal said first portion than said second portion. 
     
     
       5. The optical system for a LED fixture of  claim 1 , wherein each of said orientable lenses has a first portion most proximal said mounting surface and a second portion most distal said mounting surface, and wherein said base is more proximal said first portion than said second portion. 
     
     
       6. An optical system for a LED luminaire, comprising:
 a mounting surface; 
 a plurality of individual LEDs attached to said mounting surface; 
 a plurality of orientable lenses each having a base; 
 wherein said base of each of said orientable lenses is adjacent to said mounting surface about a single LED of said plurality of LEDs; 
 a positioning sheet in contact with said base of each of said orientable lenses, said positioning sheet having a plurality of lens apertures, each of said lens apertures surrounding a portion of one of said orientable lenses; 
 wherein at least a portion of said orientable lenses extends past said positioning sheet; 
 whereby said positioning sheet provides force on said base of each of said orientable lenses in a direction towards said mounting surface, thereby compressing each of said orientable lenses against said mounting surface; 
 wherein at least some of said orientable lenses have a primary reflector at least partially surrounding a refracting lens; and 
 wherein said refracting lens and said primary reflector collimate light emitted from said single LED to a reflective surface supported by said base and angled to reflect a majority of said light off a LED light output axis of said single LED. 
 
     
     
       7. The optical system for a LED luminaire of  claim 6 , further comprising a heatsink thermally coupled to said mounting surface. 
     
     
       8. The optical system for a LED luminaire of  claim 6 , wherein each of said lens apertures has an alignment notch and each of said orientable lenses has an alignment protrusion extending from said base and received in said alignment notch. 
     
     
       9. The optical system for a LED luminaire of  claim 8 , wherein each of said orientable lenses has said primary reflector at least partially surrounding said refracting lens. 
     
     
       10. An optical system for a LED luminaire, comprising:
 a mounting surface supporting a plurality of LEDs, said mounting surface also supporting electrical connections from said plurality of LEDs to a power supply; 
 a positioning sheet mountable adjacent to said mounting surface and having a plurality of apertures such that when said positioning sheet is mounted adjacent said mounting surface, said plurality of apertures are aligned with said plurality of LEDs of said mounting surface; 
 a plurality of lenses having a base positioned between said positioning sheet and said mounting surface, at least a portion of each of said lenses extending past said positioning sheet; 
 wherein said lenses are individually rotatable within each of said apertures to redirect light emitted from at least a single LED of said LEDs positioned directly below each of said lenses to a predefined location, each of said lenses having an alignment structure allowing each of said lenses to be locked into at least one predefined rotational angular position about said LED positioned directly below said lens; 
 wherein each of said lenses have a primary reflector at least partially surrounding a refracting lens; and 
 wherein said refracting lens and said primary reflector collimate light emitted from said single LED to a reflective surface supported by said base and angled to reflect a majority of said light off a LED light output axis of said single LED. 
 
     
     
       11. The optical system for a LED luminaire of  claim 10 , wherein said alignment structure includes at least one alignment protrusion. 
     
     
       12. The optical system for a LED luminaire of  claim 11 , wherein said alignment protrusion extends from said base of each of said lenses. 
     
     
       13. The optical system for a LED luminaire of  claim 11 , wherein said positioning sheet has a plurality of alignment receptacles each configured to receive a single said alignment protrusion. 
     
     
       14. The optical system for a LED luminaire of  claim 13 , wherein at least some of said alignment receptacles are each provided in a single of said apertures. 
     
     
       15. The optical system for a LED luminaire of  claim 10 , wherein a rim portion extends from said base of each of said lenses, each said rim portion abutting a corresponding said aperture of said positioning sheet.